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g- 1920- CISTElN 1,350,624

REGENERATIVE FURNACE Filed April 30 1919 3 Sheets-Sheet 1 Fig.

Aug. 24, 1920. c. STEIN 1,350,624

REGENERATIVE FURNACE is g Mia).

Aug. 24, 1920. c. STEiN 1,350,624

REGENEHATIVE FURNACE Filed April 30 1919 s Sheets-Sheet a Invenhr.

3y M// W UNITED STATES PATENT OFFICE.

CHARLES STEIN, 0F PARIS, ANCE, ABBIGNOB- T0 SOOIET'E OH. H. STEIN & CIR, 0]

PARIS,

DANCE, A OOBPORQTION 0F. FRANCE.

- BEGENEBATIVE FURNACE.

Application flied April 30,

To all whom it may concern Be it known that I CHARLES STEIN, citizen of the French ltepublic, residing at Paris, Department of the Seine, in France and whose post-oilice address is 31 Boulevard Preire, in the said cit have invented certain new and useful mprovements in or Relatin to Regenerative Furnaces; and I do here y declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The present invention has for its object a vertical continuously re enerative furnace intended more particular y for the reheating of ingots to the temperature necessary for for ing or rolling.

he invention is described hereinafter in detail with reference to the accompanying drawings which represent, by way of example and dia rammatically, a constructional form of t e furnace. Figure 1 represents the furnace in vertical section on the line C, D, E, F of Fig. 2.

Fig. 2 re resents the furnace in plan on the section X B of Fig. 1.

Fig. 3 represents a vertical section of Fig.

2 on the line G, H, I, J.

Fig. 4 shows a detail illustrating the construction of the recuperator.

In the drawing, 1 is a gallery b which the gases of combustion arrive an which may-becommon to a seriesof furnaces of the same t e, 2 is a damper for regulating the flow o the gases by, the passages 3 and 4 into the working chamber or hearth 5, 6 is a flue'by which the air to support combustion arrives which passes throu h the passage 7, the. recuperator 8, and t e assages 9, 1O andll to be mixed in 4 with t e gases and cause the combustion thereof. The products of this combustion are evacuated through the fines 12 through the recuperator 8 and the lines 13, 14 and 15 and pass into the smoke collector 17 The recuperator is of hollow tile like construction arranged in spaced vertical tiers, allowing for the transverse passage of the roducts of combustibn and 1) reason of t e hollow formation of the units comprising the tiers, vertical openingsare provided for the. assage of air, as clearl shown in Fig.4. he regulation of the raft l produced y adamp r Specification of Letters Patent.

Patented Aug. 24, 1920.

1919. Serial No. 598,820.

located at 16. The hearth communicates by the passage 18 with the'cleaning pit 19.

T e action of the furnace is asfollows: The gas arrives by the gallery 1, passes throu h 2 and. 3 up to the entrance to the heart at 4, and at the same time, the air to support combustion enters by the passages 6 and 7, passes through the recuperator 8 where it is heated, then passes throu h the passages 9, 10 and 11 to arrive at 4 w ere it meets the as and mixes with this latter to produce suitable combustion and heat the ingots which are placed in the hearth 5. The products of the combustion pass by the passages 12, 13 and 14, heat the air which circulates in the opposite direction in the recuperator and pass into the passage 15 whence they are evacuated into the smoke collector 17. The su plies of gas and air and also the exit of't e smoke can be regu lated by means of special dampers.

This continuous regenerative furnace possesses over the inversion type of furnace gene'rallyadopted, the advantage that it is of more simple construction and consequently more economical.

In these arrangements the cleaning pit is completely separated, the recuperator is situated completely outside the hearth the supplies of gas, and secondary air and the exit of the smoke are on the other side of the cleaning pit, and cari be regulated, each by a s ec'ial damper. 4

he arrangement of this furnace permits of its being constructed in batteries of indefinite number, and each furnace can be regulated orextinguished individually.

claim: 1

1. A vertical I "pnaceof the class described, comprisin a hearth, means for admitting and burning therein a combustible mixture of air andfgas, means for exhausting the products of combustion therefrom, a regenerator through which the incoming arr passes and through which the outgoin products of combubstion pass for heat g said air, and a smoke collector for the final exhausting of the products of combustion provided with means for regulating said exhaust.

2. A vertical furnace of the class described, consisting :of a number of comlete, separate and independent units haviiig in common, a cleaning pit, 9 gas supply units comprising gallery and smoke collector, each of said a hearth, means for admitting therein a combustible mixture of gas and heated air, means for exhausting the products of combustion therefrom, a regenerator through which the incoming air passes and through which the outgoing products of combustion pass for heating said air, and means for cutting out one or more of the separate units without interfering with the continuous operation of the remaining units and the furnace as a whole.

3. A vertical furnace of the class described, consisting of a number of complete, separate and independent units having in common a gas supply and smoke collector, each of said units being provided with a hearth, passage-ways connecting said gas supply with a mixing chamber adjacent the hearth, an air passa e-way communicating with said mixing ciamber, a regenerator through which the air passes before entering said air passage-way, another passageway leading from'the hearth to the regenerator for conducting the products of combustion therethrough, said regenerator so constructed and positioned that the air will pass upwardly and the products of combustion downwardly, and regulating means for the admission of the gas to the mixing chamber and also for the admission of the air to the generator and the exhausting of the products of combustion from said generator, the whole forming a furnace of continuous operation.

In testimony whereof I afiix my signature.

CHARLES STEIN. 

